Abstract:
ABSTRACT
Biochar is a carbon-rich material gained from thermo-chemical conversion of biomass
in an oxygen-limited environment. Biochar can improve agricultural productivity,
particularly in low-fertility and degraded soil. The experiment was conducted at the
research farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka,
Bangladesh during the Robi season from October 2019 to January 2020 to study the
effects of nitrogen fertilizer with biochar and biochar-compost on cauliflower
performance and soil fertility. The experiment was set out in two factors split plot
design with three replications. The two factors were, Factor A: T
1
(Biochar and Compost), T
3
(No Nitrogen), N
2
(Biochar), T
2
(Control). Factor B: Four doses of nitrogen which were N
1
(50% Recommended dose of Nitrogen), N
3
(75% Recommended
dose of Nitrogen) and N
4
(100% Recommended dose of Nitrogen). In combined effect
of nitrogen with biochar-compost at 75 DAT, the maximum plant height (58.59 cm)
was obtained from T
2
N
3
which was statistically similar with T
2
N
4
(58.12 cm) and
minimum height from T
3
N
1
(52.63 cm). In combined effect of nitrogen with biocharcompost,
the maximum yield (40.94 ton/ha) was obtained from T
2
combination
which was statistically different from all other combinations and the minimum yield
(16.51 ton/ha) was found from T
3
N
1
combination treated plot. The maximum 1.97%
organic carbon was recorded from T
2
N
3
combination which was statistically similar to
T
2
N
4
(1.91%) and the minimum value 1.14% was recorded from T
3
combination
treated plot. So, combined application of biochar and compost can reduce 25% of
chemical fertilizer (nitrogen fertilizer) which is environmentally friendly and increase
yield.
N
3
N
1
Description:
A Thesis Submitted to
Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka
In partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
AGROFORESTRY AND ENVIRONMENTAL SCIENCE
SEMESTER: JULY- DECEMBER, 2020
